数控机床旋转轴误差辨识研究  

Identification of the Rotary Systematic Deviations to Machining Centers with 5-Axis

作　　者：范晋伟[1] 王志远[1] 王晓峰[1] 

机构地区：[1]北京工业大学机电学院,北京100024

出　　处：《机械设计与制造》2014年第9期156-158,163,共4页Machinery Design & Manufacture

基　　金：国家自然科学基金资助项目(51275014)

摘　　要：以多体系统理论为基础建立了包含旋转轴几何误差的DMP60U型机床运动模型,并利用某公司的QC10球杆仪对DMP60U型的C轴和斜转轴B轴各4项位置误差分别进行测量和辨识。在对球杆仪测量点的在坐标系中的位置坐标表达分析后,得出了球杆仪测量圆的偏心率与位置误差间数学关系。通过运用机床RTCP功能控制多轴同步运动,设计进行不同高度下的4次测量,可辨识出这8项位置误差,快速高效。经实验验证,这种辨识方法测量结果精确,可用于五轴加工中心误差辨识。Based on the theory of multi-body system, the kinematic error model for the machine tool is established, involving position-independent geometric deviations and position-dependent geometric deviations. And with the QCIO ball-bar produced by Renishaw company, the eight position-independent geometric deviations are measured and identifted, associated to rotary of C-axis and inclined rotary of B-axis. After analyzing the express of two measurement points in the coordiriate system, the mathematical relationship is established between the position-independent geometric deviations and the eccentricity of the measuring circle. Then, based on the function RTCP achieving four kinds of multi-axis synchronous movement with different height, the eight position-independent geometric deviations can be identified fast and efficiently. It has been confirmed that the proposed method provides precision results and is able to apply to the measurement of 5-axis machining center.

关 键 词：非正交五轴数控机床 多体系统 旋转轴几何误差 辨识方法 偏心率 

分 类 号：TH16[机械工程—机械制造及自动化]